• commitment fees lowered from 40% to 30% of the applicable interest margin; • maintaining interest margin at LIBOR plus 3.25% for the next four years; • the inclusion of the Company’s recently acquired producing assets in Equatorial Guinea in the calculation of borrowing base amounts as well as the Company’s option to include the Greater Tortue development in the future following final investment decision, up to $500 million in the aggregate; and • the addition of Kosmos Energy Finance International, Kosmos Energy Investments Senegal Limited, Kosmos Energy Equatorial Guinea, Kosmos Energy Senegal and Kosmos Energy Mauritania as additional guarantors and pledged subsidiaries. Interest is the aggregate of the applicable margin (3.25% to 4.50%, depending on the length of time that has passed from the date the Facility was entered into) and LIBOR. Interest is payable on the last day of each interest period (and, if the interest period is longer than six months, on the dates falling at six-month intervals after the first day of the interest period). We pay commitment fees on the undrawn and unavailable portion of the total commitments, if any. Commitment fees are equal to 30% per annum of the then-applicable respective margin when a commitment is available for utilization and, equal to 20% per annum of the then-applicable respective margin when a commitment is not available for utilization. We recognize interest expense in accordance with ASC 835—Interest, which requires interest expense to be recognized using the effective interest method. We determined the effective interest rate based on the estimated level of borrowings under the Facility. The Facility provides a revolving credit and letter of credit facility. The availability period for the revolving- credit facility, as amended in February 2018 expires one month prior to the final maturity date. The letter of credit facility expires on the final maturity date. The available facility amount is subject to borrowing base constraints and, beginning on March 31, 2022, outstanding borrowings will be constrained by an amortization schedule. The Facility has a final maturity date of March 31, 2025. As of December 31, 2017, we had no letters of credit issued under the Facility. We have the right to cancel all the undrawn commitments under the Facility. The amount of funds available to be borrowed under the Facility, also known as the borrowing base amount, is determined each year on March 31. The borrowing base amount is based on the sum of the net present values of net cash flows and relevant capital expenditures reduced by certain percentages as well as value attributable to certain assets’ reserves and/or resources in Ghana and Equatorial Guinea. If an event of default exists under the Facility, the lenders can accelerate the maturity and exercise other rights and remedies, including the enforcement of security granted pursuant to the Facility over certain assets held by our subsidiaries. The Facility contains customary cross default provisions. We were in compliance with the financial covenants contained in the Facility as of September 30, 2017 (the most recent assessment date), which requires the maintenance of: • the field life cover ratio (as defined in the glossary), not less than 1.30x; and • the loan life cover ratio (as defined in the glossary), not less than 1.10x; and • the debt cover ratio (as defined in the glossary), not more than 3.5x; and • the interest cover ratio (as defined in the glossary), not less than 2.25x. Corporate Revolver In November 2012, we secured a Corporate Revolver from a number of financial institutions which, as amended in June 2015, has an availability of $400.0 million. The Corporate Revolver is 93